Valve mechanism for engines.



No. 786,913,y PATBNTED APR. 11, 1905. 11H. MOORE.

`VALVE MCHANISM FOR ENG-INES. APPLIOATION 11111111 JULY 31, 1903` 6SHEETS-SHEET 2.

WITNESSES:

@wlw-117. u

Ano/m5 YS.

N0.786,91 i PATENTED APR.11,:L905.

- J.H.MOORB.

VALVE MEGHANISM POR ENGINES. APILJICATION FILED JULY 31, 1903.

6 SHEETS-SHEET 3.

NmsemsQ PATENTED Amun, 1905.

Y' n J. E. MOORE. j y

VALVE MEGHANISM EOE ENGINES.

Y I' APPLICATION FILED JULY 3l, 1903.'

' GSHEETs-SHEET 4.

2 O g l "Ilm vif/rol? A BY y K @Arron/EVS No. 786,913. f PATENTED APR.yv11, 1905,

f y i i J. H. MUORE. n VALVE MEGHANISM PoR ENGINES.

` APPLIOATIUN FILED JULY 311,11903.

6 SHEETS-SHEET 5.

Maw. wf@ Y f l MUM-HS No. 786,913.. y PATBNTLD APL.11,1905.

' J. H. MOORE. VALVE MBGHANISM PUR ENGINES.

k APYPLIOATIQN FILED JULY 31. 1903.

6 SHEETS-SHEET 6.

I MATTUHNEYS v UNITED STATES Patented April 11, 1905.

PATENT OFFICE.

JOHN HERMAN MOORE, OF CLEVELAND, OHIO, ASSIGNOR TO ANNA Z. .BAXTER ANDA. A WILLIAM BAXTER, OF CLEVELAND, OHIO.

VALVE NIECHANISNI FOR ENGINES;

SPECIFICATION forming of Letters-)Patent N0. 786,913, dated April 11,1905. n Application filed July 3.1, 1903. Serial No. 167,756'

To all whom t may 'concern/.-

Be it known thatI, JOHN HERMAN MOORE, a citizen of the United States ofAmerica, re"- siding at Cleveland, in the county ofOuyahoga and State ofOhio, have invented certain new and usefulV Improvements in ValveMechanism for Engines; and I hereby declare the foly lowing to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it pertains to make and use the same.

This invention relates to improvements in valve mechanism for enginesoperated by fluid under pressure, and pertains more especially to valvemechanism especially well adapted for steam-engines and comprising tworotary steam-admission valves and twov rotary exhaust-valves.

One object of thisinvention is to reduce the clearance or length oftravel of the steam or fluid under pressure between the valve-'casingand the chamber of the cylinder.

Another object is to perfectly balance the iiuid-pressure-admissionvalves of the valvecasing and to reduce the wear upon the said valves toa minimum. y

lAnother object is to automatically take up any wear between each valveof the valvecasing and the adjacent face of the adjacentvalve-seat-forming partition in the valve-casing. v

Another object is to utilize the inclosing casing or shell of the'governing mechanism asa portion of the reversing mechanism of theengine.

Another object is to prevent the destruction of or injury tothe'cylinder and valve'mechanism by hydraulic or spasmodic pressurecreated within the cylinder from any cause.

Another object is to have the exhaust-valves independent of vthefluid-pressure admission valves and to provide means whereby the pointof cut-off-that is, the time at which the supply` of fluid underpressure to either end of the cylinder relative to the position of thepiston-may be regulated or changed at pleasure, whereby the point ofcut-ofi' in supplying Huid under pressure to one end of the cylinder maybe regulated or changed independ-I l ently of the point ofcut-offinsupplying fluid under-.pressure to the other end of thecylinder, whereby the point of release-that is, the

gins to exhaust relative to the position of the piston-may be regulatedat pleasure, and whereby the point of release in exhausting from onecndof the cylinder may be regulated hausting from the other end of thecylinder, and whereby the point of release, and consequently the amountof compression, may be regulated or changed independently of the point'of cut-off.

With the above-mentioned objects in view and to the end of realizingother advantages hereinafter appearing this invention consists incertain features of construction and combinations of parts hereinafterdescribed, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a top plan, largely insection, illustrating the engine-cylinder, the piston and piston-rod,valve mechanism, and a portion of the means employed in transmittingpower from the engine-shaft to the valve mechanism. Fig. 2 is a topplan, largely in section, showing the mitting motion to the said shaft,and a portion of the means employed in transmitting power from theengine-shaft to the valve mechanism. Fig. 3 is a side elevation, invertical section. on line 3 3, Fig. l, looking in the direction of thecylinder. Figs. 4, 5, 6, 7, 8, and 9 are transverse vertical sect-ionson line 4f 4, line 5 5, line 6 6, line 7 7, line 8 8, and line 9 9,respectively, Fig. 8, looking in the direction indicated by the arrow.Fig. 10 is a side elevation, partly in section, of a portion of thevalve-bearing shaft, governing mechanism, and means instrumental inreversing the engine. Figs. 11 and 12 are transverse vertical sectionson line 11 l1 and line 12 12, respectively, Fig. 10, looking in the di-*rection indicated by the arrow.

Referring to the said drawings, and more especially to Figs. l and 2, adesignates the cylinder 0f the engine, b the piston arranged within andadapted to reciprocate cndwise of engine-shaft, the pitman employed intraps-- time at which either end of the cylinder beindependently of thepoint of release in exthe chamber of the cylinder, and c the pistonrod,which extends through a stuiiing-box (Z, formed upon the lower or innerend of the cylinder. neeted with a cross-head A, arranged in line withthe piston-rod and engaging with a slideway B, which cross-head isoperatively connected by a pitman or link e with the wrist of the crankf, with which the suitably-supported engine-shaft g is provided. Theshaft g and the cylinder a are arranged horizontally and at a rightangle to each other.

A valve-casing Z is arranged at one side of the cylinder a. Thevalve-casing Z is formed upon or supported from the cylinder t in anyapproved manner.

A valve-bearing shaft D is arranged horizontally and parallel with thecylinder a. The shaft D extends longitudinally and centrally through thevalve-casing Z. The valve-casing Z at its inner end and adjacent to theinner or stuflng-box-bearing end of the cylinder a is provided with astuffing-box my around the shaft D. The valve-casing Z is also providedat its opposite end with a stuffing box M around the shaft D.

Between the shaft D and the engine-shaft f/ is a shaft Z5, which isarranged at a right angle to the engine-shaft and in line endwise withthe shaft D. rl `he shaft Ze extends from a point in suitable proximityto the shaft D to a point near the engine-shaft g, which is intergeared,as at w, with a suitably-supported short shaft y, arranged parallel withthe shaft g between the said shaft g and the adjacent end of the shaftThe shaft 1/ is operatively provided with a bevel-gear c', which mesheswith a bevel-gear j, operatively mounted 0n the shaft Zt. Power istransmitted from the shaft Zr; to the shaft D, as will hereinafterappear. Y

rlhe valve-casing Z is provided interiorly with a cylindrical bore C, inwhich are arranged two fluid-pressure-admission valves Gr, twoexhaust-valves K, and two valve-seatforming partitions- H.

1The two valves G, which control the admission of steam or iuid underpressure to the cylinder a, are arranged a suitable distance apart andequidistant from opposite heads L, respectively, of the valve-easing Z.The valves G are shown very clearly in Figs. 1, 3, 4, and 9. The twovalves G are shown formed upon opposite ends, respectively, of a collarZt, and each valve Gr comprises, preferably, a disk which is integralwith the collar t. rlhe collar ZL, and consequently the valves G, areoperatively connected with the shaft D. The operative connection betweenthe collar Zt and the shaft D comprises the well-known means of grooveand feather, as at F, and suitablyapplied set-screws E, which areinstrumental also in fixing the said collar to the said shaft. Theannular space J, which surrounds the collar /L and extends between thevalves Gr,

r1`he piston-rod c is operatively con- 'constitutes the live-steamchamber or main fluid-pressure-receiving chamber of the valvecasing,which chamber communicates at the top with the Huid-pressure inlet l,with which the top of the valve-casing is provided centrally between theends of the said casing, as shown in Figs. 3 and 4.

Each valve Gr is circular and has the dimensions required to render itcapable of fitting snugly but rotatably within the bore (l of thevalve-casing. Each valve G is provided in its outer end face with acircular recess fn, which surrounds the shaft D and is instrumental informing the outer end of the Hind-pressureconducting port N, with whichsaid valve is provided, which port extends endwise through the valve.The two valves Gr correspomil in construction; but they are reverselyarranged, and the ports N of the different valves (l are arranged atdiametrically opposite sides, respectively, and concentrically of theshaft D. rlhe port N of each valve G extends concentrically of the shaftD about one-sixth of the distance circumferentially of the collar Z1.,as illustrated in Fig. 4, which shows one of the said valves.

The two exhaust-valves K are arranged within opposite ends,lrespectively, of the bore C of the valve-casing. Each valve K isarranged far enough vfrom the outer end face of the adjacentpressure-admission valve te accommodate the interposition between thesaid valves of a valve-seat-forming partition, which comprises anannular block H.

Each valve K comprises a circular disk which is large enough indimensions to render it capable of snugly but turnably [ittingwithin thebore() and formed upon and preferably integral with the inner end of asleeve n, which is operatively but slidably mounted on the shaft D. Theoperative connection between eaeh sleeve 0 and the shaft D is preferablyfoimed by the well-known means ol groove and feather, as at 71, as shownin Figs. 1 and 5. Each valve K is provided with an exhaust-port P, which(see Fig. 1) extends endwise through the said valve and communi- Cateswith the annular space Q, formed around the sleeve o, upon which thesaid valve is formed, which space constitutes an exhaustchamber, whichis lconnected by a passage-way fr, formed at the bottom of thevalve-casing, with the exhaust-outlet R, with which the said easing isprovided at the bottom and centrally between the ends of thevalve-casing, as shown in Figs. 3 and 4.

rlhe ports P of thc different exhaust-valves K are arranged atdiametrically opposite sides, respectively, of the shaft D, as shown inFig. 1. The port P of each exhaust-valve K and the port N in theadjacent pressure-admission valve G are arranged at diametricallyopposite sides, respectiif'ely, of the shaft l). 'lhe port P of eachexhaust-valve K extends concentrieally of the shaft lf) preferably aboutIOO TTO

y one-fourth of the distance circumferentially of the sleeve o, uponwhich the said valve is formed, as shown in Fig. 5. 4

The block H of each valve-seat-,forming partition interposed between theouter end face of the adjacent exhaust-valve K is large enough indimensions to render it capable of snugly fitting within the bore C ofthe valve-casing without, however, interfering with its limitedcapability of shifting endwise of the said casing. l The said block Hcomprises a centrallylocated core 15, which is annular, surrounding theshaft D and having its bore, through which the said shaft extends,somewhat larger diametrically or transversely than the said shaftto forma passage-way s around and next to the said shaft, as shown in Figs. 3,6, 7, and 8, which passage-way extends through and from end to end ofthe said block. The said block is provided (see Figs. 3, 6, and 8) withperipheral packing-rings u, which extend cir- `cumferentially of theblock and "maintain a iuid -tight joint between theblock and thesurrounding wall of the bore C of the valvecasing. The said block H isprovided in each end face thereof, as shown in Figs. 8, 6, and 8, withan annular recess t, which surrounds the core 15 of the Vblock and isarranged concentrically with and extends circumferentially of the shaftD. The different recesses fof each block H are instrumental in theformation of opposite ends. respectively, of a port T, with which thesaid blockis provided, which port extends endwise through the block andconcentrically of the shaft D. The fluid-pressure-receiving end 16 ofeach port T extends circumferentially of the shaft D equidistantly orapproximately equidistantly withthe port N of the adjacentpressure-admission valve G, and consequently extends about one-sixth ofthe distance around thesaid shaft, whereas theiiuid-pressure-discharging end 17 of the saidport extendscircumferentially of'the said shaft-equidistantly or approximatelyequidistantly with the port P of the adjacent exhaustshown very clearlyin Fig. 7. The said block is provided diametrically opposite each port Twith a lateral aperture 20, which is formed j in the outer end of theblock and communicates with, and consequently affords access to, thechamber 18 of the block, as shown in Figs. 1 and 6. Meansfor preventingdisplacement of the said block H circumferentially is provided andcomprises, preferably, a screwthreaded pin 21, which, as shown in Figs.1

Said pin 21 does not, however, fix the said block to the valve-casing;but the aforesaid hole 22 is elongated somewhat endwise of the block orlongitudinally of the valve-casing, as shown in Fig. 1, to accommodate alimited shiftability of the block inwardly endwise of the said casing.

The port T of the block H of one of the valve-seat-forming partitionscommunicates with the cylinder-port 14, which communicates with thechamber of the cylinder a at one end of the cylinder, and the portTofthe block H of the other valve-seat-forrning partition communicates withthe cylinder-port 14C, which is in communication with the said chamberat the opposite end of the cylinder.

Each exhaust-valve-bearing sleeve ois provided at its outer end, asshown very clearly in Fig. 8, with an external annular flange 25, whichis provided at its periphery and outer face with an annular rim 26,which snugly but turnably embraces a metal ring w, which surrounds andis arranged concentrically relative to the shaft D and abuts tightly atits outer end against the inner side of the adja-l cent head L of thevalve-casing Z. Said flange 25 isv provided iny its outer face andadjacent to the inner end of the said ring w with any suitable number ofrecesses 27, arranged at suitable intervals circumferentially of thesaid sleeve 0 and containing spiral springs 28,l which extend fromwithin the said recesses into engagement with and bear against the innerend of the said ring and hold said ring sufiiciently snugly against theinner side of the adjacent head L of the valve-casing to render thejoint between the said head and the said ring practically iiuid -'tight.Said springs 28 also act to retain' the adjacent exhaust-valve K againstits seat on the adjacent valve-seat-forming partition.

It will be observed that an annular space or chamber 30 is vformedaround the shaft D at the outer end of each sleeve 0 and within the ringw adjacent to the said sleeve, and enough steam or iuid under pressureis conducted into the said chamber, as will hereinafter appear, tomaintain just enough pressure upon the outer end of the said sleeve tocause the said sleeve and the valve K formed thereon to exert enoughpressure against the outer end face of the adjacent valve-seat-formingpartition to hold the said partition constantly against the outer endface of the adjacent pressureadmission valve G and take up any wearwhich may occur after long usage between the said partition and the saidvalves.-

The springs 28 normally havea range of compressibility, and the rim 26of the fiange 25 of each sleeve 0 does not embrace the enroo TIO'

gaging ring w from end to end and does not, therefore, extend intoengagement with the adjacent head L of the valve-casing, so that thesaid sleeve, and consequently the exhaust-valve K formed on the saidsleeve, are capable of shifting to a limited extent outwardly endwise ofthe shaft D. Each exhaust-Val ve is, therefore, yieldabl y held againstthe outer end face or valve-seat of the adjacent valve-seat-formingpartition, and any hydraulic or spasmodic pressure created Within thecylinder a when the exhaust-Valve K adjacent to the said end of thecylinder is closed instead of resulting in injury to any member of theengine acts, through the cylinder-port 14 of the said end of thecylinder and through the port T, formed in the adjacentValve-seatforming partition and communicating With the saidcylinder-port, against the inner face of the adjacent exhaust-valve andcompels the said Valve to yield against the action of the springs 28,which act to retain the said valve against its seat on the saidpartition, and hence escapes between the said partition and the saidvalve into the adjacent exhaust-chamber Q, without having damaged anymember or portion of the engine.

The arrangement of the parts hereinbefore Adescribed and including thepressure-admission valves, the valve-seat-forming partitions, and theexhaust-valves K is such that, as shown in Fig. 1, -the port N of thepressureadmission valve Gr at one end of each partition and the portP ofthe exhaust-Valve K at the opposite end of the said partitioncommunicate alternately With the port T of the said partition during theoperation of the shaft D, and the different pressure-admission valvesopen alternately. Obviously, therefore, when live steam or iiuid underpressure passes from Within the chamber J through the port in eithervalve Gr and through the port T in the partition adjacent to the saidValve into one of the cylinder-ports 14 the exhaust-valve K adjacent tothe said partition will be closed and the other cylinder-port 14 will beexhausting through the port T in the other partition and through theport P in the other exhaust- Valve.

- To render it possible to lengthen or shorten the period ofHuid-pressure admission to the cylinder-that is, the period of timeduring which Huid under pressure is admitted to either end of thecylinder during the operation of the engine-to render it possible tochange the time at which the said period of Huid-pressure admissionbegins, and consequently to control the lead-opening, to render itpossible to control the termination of the period of fluid-pressureadmission-that is, to control the point of cut-oif-to render it possibleto control the commencement and the termination of the period ofHuid-pressure admission independently of each other, to render itpossible to change the beginning, du-

ration, and termination of the period of iinidpressure admission toeither cylinder-port independently of the commencement, duration, andtermination of the period of {luid-pressure admission to the othercylinder-port, and to render it possible to change the beginning,duration, and termination of the period of fluid-pressure admission toeither cylinderport independently of the termination, duration, andcommencement of the period of release or exhaust through the othercylinderport, the following is provided:

The recess z5 in the inner end of each block H, as shown in Figs. 3, 7,and S, contains two plates 35, which are adjustable endwisecircumferentially and arranged concentricall y of the shaft D. The saidplates 35 lill the said recess widthwise and are arranged with theirouter faces Hush with the inner extremity of the said block H. Hence thesaid plates 35 participate in the formation on the inner end of thepartition comi'nising the said block of a seat for the pressure-admission valve (i next adjacent to the inner end of the said partition.The said plates 35 are arranged at opposite sides, respectively, of theport T of the said partition circumferentially of the shaft l). Each ofthe said plates 35 is provided centrally between its ends with abolt-hole 30, which is engaged by a bolt 37, arranged with its headcountersunk in the outer side of the said plate, as shown in Fig. 3,which bolt extends through a slot 38, formed in the inwardly-'facingcentral wall of the recess engaged by the said plate, into the chamberlh of the said block. The said slot 38 isarranged concentrically of theshaft .1), and a nut 3.) is mounted on the shank of the said bolt withinthe said chamber 18. Obviously the plates 35 are rendered free to beadjusted endwise circumferentially of the shaft l.) upon loosening thesaid nuts 39 and are secured in the desired adjustment by tightening thesaid nuts. It will be observed that by means of the adjustable plates 35of each valve-seatforming partition the commencement, duration, andtermination of the period of fluidpressure admission in admitting Huidunder pressure to the cylinder through ,the port 'l in the saidpartition may be changed at pleasure and independently of the meanshereinafter described and employed to control the termination, duration,and beginning of the period of exhaust or release in exhausting throughthe said port and indepeinlently of the control of the period of exhaustor release and of the period of fluid-pressure admission through theport T in the other valveseat-forming block.

To render it possible to lengthen or shorten the period of exhaust orreleasethat is, the period of time during which either end of thecylinder exhausts during the operation of the engine--to render itpossible to change the point of releasethat is, the time at which thesaid period beginsto render it possible to control the termination ofthe said period, to render it possible to control the commencement andthe termination of the said period independently of each other, torender it possible to control the beginning, duration, and terminationof the period of exhaust or release through either cylinder-portindependently of the commencement, duration, and termination of theperiod of exhaust orrelease in exhausting `through the othercylinder-port, and to render it possible to control the beginning,duration, and termination of the period of exhaust or releaseindependently of the termination, duration, and commencementvof theperiod of Huid-pressure admission circumferentially-adjustable plates 45are contained with the recesses t, formed in the outer ends of theblocks H.

As shown in Figs. 3 and 6, each block H is` provided within the recesst, formed in the outer end of the said block, with two plates 45,extending circumferentially and arranged concentrically of the shaft D.The said plates 45 fill the said recesswidthwise and are arranged withtheir outer faces flush with the outer extremity of the said block H.The said plates 45 participate in the formation of the valve-seat forthe exhaust-valve K, arrangedcontiguous to the outer end of thevalve-seat-forming partition comprising the said block H. The saidplates 45 are arranged at opposite sides, respectively, of the port T inthe saidpartitvion circumferentially of the shaft vD and are adjustableendwise. Each of the said plates 45 is provided centrally between itsends with a bolt-hole 46, which is engaged by a bolt 47, arranged withits head countersunlr in thel outer side of the respective plate, asshown in Fig. 3, which bolt extends through a slot 48, formed in theoutwardly-facing wall of the recess engaged by the said plate, into thechamber 18 of the said block. The said slot 48 is arrangedconcentrically of the shaft D, and a nut 49 is mounted on the shank ofthe said bolt47 within the chamber 18 of the said block H. Obviously theplates 45 arc rendered free to be adjusted endwise circumferentially ofthe shaft D upon loosening the nuts 49 and are secured in the desiredadjustment by tightening the said nuts.

' It will be observed that by means of the adjustable plates 45 thebeginning, duration, and termination of the period of exhaust or releasein exhausting from the cylinder through the port T in eitherValve-seat-forming block may be changed at pleasure and independently ofthe means employed to control the termination, duration, andcommencement of the period of Huid-pressure admission through the saidport independently of the control of the period of fluid-pressureadmission and the period of exhaust or release through the port T in theother valve-.seat-forming block.

. The governor or mechanism for controlling.

or governing the speed of the engine-shaft is shown to be as follows:Arranged within and centrally of the valve-bearing shaft D is adiametrically smaller shaft 50, which extends through'the shaft D, andstuffing-boxes 40 (see Figs. 1, and 10) are provided around the innershaft 50 at the ends of the out-er shaft D. The shaft D is thereforetubular, and the shaft 50 has bearing within the shaft D.

Within the recess n of each pressure-admission valve G is contained acut-ofi1 valve 52, as shown in Figs. l, 3, and 9. Each valve 52 (seeFig. 3) has a hub 53, which embraces and has bearing upon the shaft D.Said hub 53, as shown in Fig. 9,- is provided in the surrounding wall ofits central bore with two diametrically oppositely arranged recesses 54,

and a key 55 extends into the said recesses and transversely of andthrough the shaft 50, which is provided with a transverse slot56 toaccommodate the location of the said key. Obviously, therefore, the key55 extends through the shaft D, which is provided with two diametricallyoppositely arranged slots 57, extending circumferentially of andarranged concentrically with the shaft 50. Each vcut-off valve has ahead 58 projecting radially and outwardly from the hub of the valve intothe closest possible proximity. to the surrounding wall of the recess n,wherein the said valve is arranged without interfering with thecapability of the said cut-off valve to shift circumferentially of theshaft D independently of Vits rotation with the pressure -admissionvalve Gr containing the said cut-01T valve. The

'arrangement of the parts is such that the saidl `cut-off valve isarranged with its head 58at thatside of the port N of thesaidpressure-admission valve which lfaces in the direction in which the saidpressure-admission valve ro- ,tates du ring the operation of the engine,which direction is indicated bythe arrow placed on the saidpressure-admission valve in Fig. 9,y

4and normally the said cut-off valveis arranged ynormal position in thedirection opposite to the direction in which the shaft D, andconsequently the pressure-admission valves G, is rotated during theoperation of the engine,- is provided and comprises, preferably, a plate60, which, as shown in Fig. 9, is mounted' upon and embraces the hub ofthe said cutoff valve. The said plate fills the said recess widthwiseand extends from the rear side of the head of the said cut-off valvecircumferentially and concentrically of the hub of the said valve in thedirection opposite the direction in which `the shaft D is rotated tothey IOO wall of the port N of the pressure-admission l valve comprisingthe said plate, which faces in the direction opposite to the directionin which the said valve is rotated during the operation of the engine.Means for preventing endwise displacement of the said plate 69circumferentially of the hub of the said cutofi1 valve is provided andcomprises (see Figs. 1 and 9) a screw 62, whose shank engages acorrespondingly screw threaded hole 63, formed in the said plate, whichscrew extends through the pressure-ad mission valve Gr, provided withthe said plate, and is arranged with its head at the back of the saidvalve, as shown in Fig. 1. The said plate 60 is flush at its outer sidewith the outer extremity of the said valve, and consequentlyparticipates in the formation of the outer end face of the said valve.

Surrounding the shafts D and It' at the adjacent ends of the said shafts(see Figs. 1, 10, 11, and .12) is a casing comprising two disks 7 0 and80, which form opposite end walls, respectively, of the chamber 65,formed by and interiorly of the said casing. The disk 70, as shown inFigs. 10 and 12, is operatively mounted in any approved manner upon theshaft 7n and is arranged concentrically of the said shaft and extends,preferably, half-way round the shaft. The slot 72 is engaged by ascrew-threaded pin 82, fixed to the disk 80, which is operativelymounted on the shaft 5() in any approved manner.

The pin-bearing disk 8O is provided at its periphery with an annular rim83, which projects toward the slotted disk 70 and is arranged to formthe surrounding wall of the chamber 65 and at its outer end has aninternal annular flange 84, overlapped at its outer side by the disk 70,which is provided upon its inner side with an annular ange 7 4,surrounded by the fiange 84 of the rim 83. The pin 82 is secured to theflange 84 ofthe rim 83 of the inner disk 80. A nut 85 is mounted uponthe outer end of the pin 82 at the outer side of the disk 70, and awasher 86 is interposed between the said nut and the outer side of thesaid disk 70. rlhe arrangement of the parts is such that during theoperation of the engine the one or the other end wall of the slot 72engages the pin 82, according as the engine-shaft is to be driven in theone direction or the other. The engagement of the pin 82 with the one orthe other end wall of the engaging slot 72 obviously establishesoperative connection between the disks 7 9 and 80, andconsequentlybetween the shaft D and the shaft cf In the case illustratedthe engine-shaft is driven in the direction indicated bythe arrow placedupon the said shaft in Fig. 2, and consequently the shaft /r is drivenin the direction indicated by the arrow placed thereon in Figs. 2 and12, and the pin 82 is engaged by that end wall of the slot 72 whichfaces in the direction in which the shaft 7c is rotated, and the shaft Dis driven in the direction required to rotate the valves thereon in thcdirection indicated by the arrows placed upon the said valves in Figs.-t and 9.

The shaft 50 extends into the chamber 65 a suitable distance and withinthe said chamber is operatively provided, as shown in Fig. 11, with twooppositely projecting` corresponding arms 65; Each shaft-arm 65 isoperatively connected at its outer or free end by a link 66 with one endof a weight-bearing lever 67, which is fulcrumed at its opposite end, asat 68, to the disk 80. The two weightbearing levers are parallel andreversely arranged at opposite sides, respectively, of the shaft 50, andthe shaft-arms 65, links 66, and the levers 67 and their weights 69 areall arranged within the chamber 65. Suitably-applied springs 75 act toretain the levers 67 in their normal position, which springs arearranged externally of the chamber 65 and attached at one end to thedisk 8() and attached at their opposite ends by bolts 76 to the lever67, and thedisk 80is suitably slotted, as at 77, to accommodate thelocation of the said bolts 76 during any actuation of the said levers.

The arrangement of the' parts is such that when the speed of theengine-shaft becomes greater than desired during the operation ol theengine the speed of the valve-bearing shaft D will have becomecorrespondingly greater and result in the actuation of the weightedlevers 67 by centrifugal force outwardly away from each other agaii'istthe action of the springs 75, and the outward movement of the weights 69results in the actuation of the cut-olf valves 52 as required to causesaid valves to more or less obstruct the passage-way through theports Nof the pressureadmission valves Gr, and thereby reduce the quantity offluid under pressure admitted to the engine-cylinder, so as to result ina. reduction of the speed of the engine-shaft, and when the normal speedof the engine-shaft again obtains the weighted levers 67 will again havebeen returned to their normal or inner position by the action ofthesprings 75.

The means employed for diverting steam of fluid under pressure from thechamber .l to the cham bers 8O at the outer end ol' the sleeves 0 (sceFigs. 3, 4, 7, and 9) comprises the l'ollowing: Tithin the surroundingwall of the bore of the hub It, centrally between the ends of the saidhub, is formed an annular recess 90, and the said wall is also providedat each end of the hub with an annular recess 92, which is placed incommunication with the central recess by a port 93, formed in andextending longitudinally of the hub. Communication between the centralrecess 9() and the chamber J is established by a port 91, which connectsthe said recess with the said chamber. The hub 55 of each eut-oli' valve52 is provided within the surrounding wall of the bore of the said hubwith tworecesses 95,

lOO

which are diametrically opposite and extend endwise through the said huband communicate with the adjacent end recess 92 in the hub t. Therecesses 95 are adapted to receive the key 55 of the said cut-off valvewhen the pressure-admission valves G are rotated in the directionopposite to the direction indicated by the arrows in Figs. 4 and 9, inwhich case the said cut-off valve will be normally set with its head 58against the opposite end of the adjacent stop-forming plate 60. Therecesses 95 in the cut-off valves constitute, therefore,the ports whichestablish communication between the end recesses 92 of the hub 7L andthe chambers s in the valve-seat-forming partitions,v

and communication between the said chambers s and the chambers 30 isestablished by cross-sectionally small ports 96, formed in and extendinglongitudinally of and through the sleeves 0.

What I `claim isl. The combination, with the engine-cylining Shaftcentrally between the ends of the valve casing; two fluid pressure admission valves formed upon opposite ends respectively of the said collarand provided each` with a port extending through the respective valve;-a iiu1d-pressure-rece1v1ng chamber formed within the valve-casing andaround the aforesaid collar between the two pressure-admisvsion valves;two exhaust-valves arranged Within opposite ends respectively of theaforesaid bore and operatively mounted on the valve-bearing shaft andprovided each with aY port extending through the respective valve;exhaust-chambers formed within the valvecasing and communicating withthe ports in the exhaust-valves, and a valve-seat-forming partitionsnugly interposed between each exhaust-valve and the adjacentpressure-admission valve and provided with a port which extends throughthe partition, and the ports in the different partitions communicatingwith the different cylinder-ports respectively substantially as shown,for the purpose specified.

2. The combination, with the engine-cylinder, the piston within thecylinder; the engine-shaft operatively connected with the piston; thevalve-casing arranged externally of the cylinder and providedinteriorlylwith a bore which extends longitudinally of the valvecasingand having a fluid-pressure inlet and an exhaust-outlet, the twocylinder-ports connecting, at one end, with the aforesaid bore andopening, at the opposite end, into the interior chamber of 'thecylinder, and a valvebearing shaft arranged centrally and longitudinallyof the valve-casing and operatively connected with the engine-shaft, ofal collar operatively mounted onthe valve-bearing shaft centrallybetween the ends of the valveterposed between each exhaust-valve andthe.

adjacent pressure-admission valve and provided with a port whichextendsthrough the partition, and the ports in the different partitionscommunicating with the different cylinder-ports respectively,substantially as shown,

forthe purpose specified.

3. The combination, with the engine-cylinber; the piston within thecylinder; the engine-shaft operatively connected with the piston; thevalve-casing arranged externally and longitudinally .of the cylinder andprovided interiorly with a bore which extends longitudinally of thevalve-casing; the two cylinderports connecting, at one end, with theaforesaid bore and opening, at the opposite end, into opposite endsrespectively of the interior chamber of the cylinder, and avalve-.bearing shaft arranged centrally and longitudinally of thevalve-casing and operatively connected with the engine-shaft, of twotluid-pressureadmission valves operatively mounted on the valve-bearingshaft a suitable distance apart `within the aforesaid bore and asuitable distance inwardly from opposite ends respectivelyof thevalve-casing and provided each with a port extending through therespective valve; a iuid-pressure-receiving chamber formed within thevalve-casing circumferentially of the valve-bearing shaft between thepressure admission valves; two exhaustvalves arranged within oppositee'ndsrespec- -tively ofy the aforesaid bore and operatively mounted onthe valve-bearing shaft and provided each witha port extending throughthe respective valve; exhaust-chambers formed within the Valve-casingand communicating with the ports in the exhaust-valves, and a valve-seat-forming partition snugly interposed between each exhaust-valve and theadjacent pressure-admission valve and provided with a port which extendsthrough the partition, and the ports in the different partitionscommunicating with the different cylinder.- portsLrespectively.

4. The combination, with the engine-cylinder; the piston within thecylinder; the engine-shaft operatively connected with the piston; thevalve-casing arranged externally of the cylinder and provided interiorlywith a bore which extends longitudinally of the valve-casing and havinga fluid-pressure inlet and an exhaust-outlet; the two cylinder-portsconnecting, at one end, with the aforesaid bore and opening, at theopposite end, into the interior chamber of the cylinder, and avalvebearing shaft arranged centrally and longitudinally of thevalve-casing and operatively7 connected with the engine-shaft, of twofluidpressure-admission valves operatively mounted on the valve-bearingshaft a suitable distance apart within the aforesaid bore and providedeach with a port which extends through the respective valve andcommunicates with the aforesaid fluid -pressure inlet; twoexhaust-valves arranged within the aforesaid bore in suitable proximityto the different pressure-admission valves respectively and operativelymounted on the valve bearing shaft and provided each with a port whichextends through the respective valve and communicates with the aforesaidexhaust-outlet, and a valve-seat-forming partition snugly interposedbetween each exhaust-valve and the adjacent pressure-admission valve andprovided with a port which extends through the respective partition, andthe ports in the different partitions communicating with the differentcylinder-ports respectively, substantially as shown, for the purposespecified.

5. The combination, with the engine-cylinder; the piston within thecylinder; the engine-shaft operatively connected with the piston; thevalve-easing arranged externally of the cylinder and provided interiorlywith a bore which extends longitudinally of the valvecasing, and the twocylinder-ports connecting, at one end, with the said bore and opening,at the opposite end, into the interior chamber of the cylinder, of tworotary iiuidpressure-admission valves arranged a suitable distance apartwithin the aforesaid bore and a suitable distance inwardly from oppositeends respectively of the valve-casing; a fluidpressure-receiving chamberformed within the valve-casing between the pressure-admission valves;two rotary exhaustvalves arranged within opposite ends respectively ofthe aforesaid bore; exhaust-chambers formed within the valve-casing; avalve-seat-forming partition snugly interposed between eachexhaust-valve and the adjacent pressure-admission valve and providedwith a port which extends through the partition and the ports in thedifferent partitions communicating with 4the different cylinder-portsrespectively;

means establishing operative connection between the aforesaid valves andthe engineshaft, and ports in the valves to exhaust steam from one endof the cylinder through the port in one of the partitions while steam isadmitted through the port in the other partition into the other end olthe cylinder.

6. rl`he combination, with the engineeyliuder; the valve-casing arrangedexternally of the cylinder and provided interiorly with a. boreextending' longitudinally of the valvecasing, and two cylinder-portsconnecting, at one end, with the aforesaid bore and opening, at theopposite end, into the interiorchamber of the cylinder, of two rotaryduid-pressureadmission valves arranged a suitable distance apart withinthe aforesaid bore and provided each with a fluid -pressureconductingport which extends through the respective val ves; two rotaryexhaustvalves arranged within the aforesaid bore in suitable proximityto the di'erent pressure-admission valves respectively and provided eachwith'an exhaust-port which extends through the respective valves, avalve-seat-forming partition snugly interposed between cachexhaust-valve and the adjacent pressure-admission valve and providedwith a port which extends through the partition, and the ports in thedill`erent partitions communicating with the diiierent cylinderportsrespectively, and means for simultaneously rotating the said valves.

7. The combination, with the engine-cylinder; the valve-casing arrangedexternally of the cylinder and provided interiorly with a bore extendinglongitudinally of the valveeasing, and the two cylimlcr-portsconnecting, at one end, with the aforesaid bore and opening, at theopposite end, into the interior chamber of the cylinder, of two rotarypressure-admission valves arranged a suitable distance apart within theaforesaid bore and provided eaeh with a port extendingthrough therespective valves; two rotary exlnuist-valves arranged within theaforesaid bore and provided eaeh with a port and arranged in suitableproximity to the different pressure-:ulmission valves respectively,which exhaustvalves are each shiftable toward the adjacentpressure-admission valve; a valve-seat-forming partition snuglyinterposed between each exhaust-valve and the adjacentpressure-:ulmission valve and provided with a port which extends throughthe partition and the ports in the different partitions communicatingwith the different cylinder -ports respectively; means acting to holdthe cxhaustval ves against the said partitions, and means forsimultaneously operating the aforesaid valves.

8. The combination, with the engine-cylinder; the valve-casing arrangedexternally of the cylinder and provided interiorly with a bore extendinglongitiulinally of the valvecasing, and the two cylimlcr-portsconnecting, at one end, with the aforesaid bore and opening, at theopposite end, into the interior chamber of the cylinder, of two rotaryfluidpressure-admission valves arranged a suitable distance apart withinthe aforesaid bore and provided with a port extending through therespective valves; a fluid pressure-receiving chamber communicatingWithl the ports in the pressure-admission valves; two rotaryexhaust-valves arranged Within the aforesaid bore in suitable proximityto the different pressure-admission valves respectively,whichexhaust-valves are each shiftable toward the adjacent pressure-admissionvalves and provided each with a port extending through the respectiveexhaust-valves; avalve-seat-forming partition snugly interposed betweeneach exhaust-valve and the adjacent Apressure-admission valve andprovided With a port which extends through the partition and the portsin the different partitions communicating With the diderent cylinderports respectively; means Wherebysome iiuid under pressure is divertedfrom the aforesaid fiuid-pressure-receiving chamber to bothexhaust-valves and applied to hold the said valves against the saidpartitions, and means for rotating the aforesaid Valves simultaneously.

9. The combination, With the engine-cylinder; the engine-shaft; thevalve-casing having a fluid-pressure inlet and an exhaust-outlet; acylinder-portopening into the interior chamber of the cylinder, and avalve-bearing shaft extending into the valve-casing and operativelyconnected with the engine-shaft, of a partition'within the valve-casingand surrounding the valve-bearing shaft, Which partition is providedwith a port which extends endwise therethrough and communicateswith theaforesaid cylinder-port; an exhaust-valveseated against one endof thesaid partition and operatively mounted on the valve-bearing shaft; anexhaust-chamber formed in the valve-casing and communicating With theaforesaid exhaust-outlet; a fluid-pressure-ad-f mission valveoperatively mounted on the valve-bearing yshaft at the opposite end ofthe aforesaid partition; a iiuid-pressure-receiving chamber formed inthe valve-casing and communicating With the aforesaid iiuidpressureinlet, and the valves being provided Withports to admit steaminto andexhaust' from the cylinder through the port in the partition. Y

l0. The combination, vvith the engine-cylinder; the engine-shaft; thevalve-casing having a Huid-pressure inlet and an exhaust-outlet; acylinder-port connecting With the intel rior chamber of the cylinder,and a valve'- bearing shaft extending into the valve-casing andoperatively connected With 'the engineshaft, of a partition Within thevalve-casing and aroundth'e valve-bearing shaft, which partition isprovided with a port Which extends endwise therethrough and communicateswith the aforesaid cylinder-port; Van exhaust-,valve seated against oneend of` the said partition and operatively mounted on the valve-bearingshaft and having a port which extends through the valve and communicateslsaid valve and communicates with the aforesaid iiuid-pressure inlet..

l1. The combination, with the engine-cylinder; the valve-casing having afluid-pressure inlet and an exhaust-outlet, and a cylinder-port openinginto the interior chamber of the cylinder, of a partition with thevalve-casing, Which partition is'provided With a port which extendstherethrough and communicates with the aforesaid cylinder-port; anexhaust-valve seated against the said partition at one end of the portin the partition and having a port which extends through ithe valve andcommunicates with the aforesaid exhaust-outlet; afluid-pressure-admission valve seated against the aforesaid partition atthe opposite end of the port in the partition and provided with a portwhich extends through the said valve and communicates with the aforesaidfluidpressure inlet, and Ameans for operating the valves. i

l2. The combination, With the engine-cylinder; the valve-casing providedinteriorly with a bore which extendslongitudinallyof the said casing,and having a fluid-pressure inlet and an exhaust-outlet, andacylinder-port connecting, at oneend, with the said bore and opening, atits opposite end, into the interior chamber of the cylinder, vof anannular partition Within and transversely of the aforesaid bore, whichpartition is provided with a port 1 which extends endWise therethroughand communicates with the aforesaid cylinder-port; a

jrotary exhaust-valve seated against one' end of the said partition andhaving a port which extends through the valve and communicates with theaforesaid 'exhaust-outlet; a rotaryv iuid-pressure-admission valveseated against the opposite end of the partition and provided with aport which extends through the said valve, and communicates with the'aforesaid fluid-pressure inlet, and means for operating the aforesaidvalves. Y

1 3. The combination, With the engine-cylinder; the valve-casingprovided interiorly with a bore Which'extends longitudinally of the saidcasing and having a fluid-pressure inlet and an exhaust-outlet, and acylinder-port connecting the said bore with the interior chamber of thecylinder, of a partition snugly {itting Within the said bore and havinga limited endWise shiftability, which partition is provided With a portWhich extends therethrough and communicates With the aforesaidcylinderport; a rotary exhaust-valve seated and bearing against one endof the said partition and having a port for conducting exhaust-steamfrom the port in the partition; a rotary iuidpressure-admission Valveseated against the opposite lend of the'partition and provided TOO witha port for conducting live steam into the partition; means acting topress the exhaustvalve against the said partition, and means foroperating the valves.

14. The combination, with the engine-cylinder; the valve-casing providedinteriorly with a cylindrical bore which extends longitudinally of thesaid casing, and having a Huidpressure inlet and an exhaust-outlet, anda cylinder-port connecting the said bore with the interior chamber ofthe cylinder, of a cylindrical partition snugly fitted within theaforesaid bore and having a limited endwise shiftability, whichpartition is provided with a port which extends endwise therethrough andcommunicates with the aforesaid cylinderport; a rotary exhaust-valveseated and bearing against one end of the said partition and having aport for conducting exhaust-steam from the port in the partition; arotary fluidpressure-admission valve seated against the opposite end ofthe said partition and provided with a port for conducting live steam tothe port in the partition; means for operating the valves, and means forpreventing circumferential displacement of the aforesaid partition.

15. The combination, with the engine-cylinder; the engine-shaft; thevalve-casing provided interiorly with a bore which extendslongitudinally of the said casing and having a fluid-pressure inlet andan exhaust-outlet; a cylinder-port connecting the said bore with theinterior chamber of the cylinder, and a valve-bearing shaft extendinginto and longitudinally of the valve-casing and operatively connectedwith the engine-shaft, of a parti'- tion arranged Within the aforesaidbore and surrounding' valve-bearing shaft and provided with a port whichextends through the partition and communicates with the aforesaidcylinder-port; an exhaust-valve seated against one end of the saidpartition and comprising an endwise-shiftable sleeve which isoperatively mounted on the valve-bearing shaft and a disk which isformed upon the inner end of the said sleeve and has a port `forconducting exhaust-steam from the port in the partition, which sleeve isprovided at its outer end with an external annular flange having anoutwardly-projecting annular rim; a ring larger diametrically than andsurrounding the valvebearing shaft within and engaging the innerperiphery of the aforesaid rim; the fluidpressure receiving chamberformed within the said ring and having an outer end wall borne againstby the said ring and arranged a suitable distance outwardly from theaforesaid rim; means acting to retain the said ring against the saidwall and acting to retain the exhaust-valve against the aforesaidpartition; a fluidpressure-admission-valve operatively mounted on thevalve-bearing shaft at the opposite end of the aforesaid partition andprovided with a port for conducting steam to the port in the partition,and means for supplying a small amount of fluid under pressure to theaforesaid fluid-pressure-receiving chalnher.

16. The combination, with the engine-cylinder; the engine-shaft; thevalve-casing provided interiorly with a bore which extendslongitudinally of the said casing and having a Huid-pressure inlet andan exhaust-outlet; a cylinder-port connecting` at one end, with the saidbore and opening, at its opposite end, into the interior chamber of thecylinder, and a valve-bearing shaft extending into and longitudinally ofthe valve-casing and operatively connected with the enginc-slmft` of apartition within the aforesaid bore and around the valve-bearing shaftand provided with a port which extends through the partition andcommunicates with the aforesaid cylinderport; an exhaust-valve seatedagainst one end of the said partition and comprising an endwise-shiftable sleeve which is operatiwly mounted on the valve-bearingshaftand a dish which is borne by the inner end of the said sleeve andhas a port which extends through the disk and communicates with theaforesaid exhaust-outlet, which sleeve is provided, at its outer end,with an external annular flange having an outwardly-projecting annularrim;

a ring larger dametrically than and surrounding the valve-bearing shaftwithin and ongaging the inner periphery of the aforesaid rim; the Huidpressure -receiving chamber formed within the said ring and having` anouter end wall borne against'l by the said ring and arranged a suitabledistance outwardly from the aforesaid rim; means acting to retain thesaid ring against the said wall and acting' to retain the exhaust-valveagainst the aforesaid partition and a iluid-pressurc-:ulmission valveoperatively mounted on the valve-hearing shaft at the opposite end ofthe aforesaid partition and provided with a port which extends throughthe said valve and communicates with the aforesaid fluid-pressure inlet.

17. The combination,with the engine-cylinder; the engine-shaft; thevalve-casing provided interiorly with a bore which extendslongitudinally of the said casing and having a fluid-pressure inlet andan exhaust-outlet; a cylinder-port connecting, at one end, with the saidbore and opening, at its opposite end, into the interior chamber of thecylinder, and a valve-bearing shaft extending into and longitudinally ofthe valve-casing and operatively connected with the engine-shaft, of apartition within the aforesaid bore and around the valve-bearing shaftand provided with a port which extends endwise through the partition andcommunicates with the aforesaid cylinder-port; an exhaust-valve seatedagainst one `end of the said partition and having a sleeve which isoperativelymounted on and shiftable endwise of the valve-bearing shaft,which valve has a port which extends endwise through the valve andcommunicates with the aforesaid IOO exhaustoutlet, ar iuid pressurereceiving chamber formed next adjacent to the outer.

18. The combination, with the engine-cylin-V der; the engine -shaft; thevalve-casing provided interiorly with a bore which extendslongitudinally7 of the said casing and havinga fluid-pressure inlet andan exhaust-outlet; a cylinder-port connecting the said bore with theinterior chamber of the cylinder, and a valve-bearing shaft extendinginto and longitudinally of the valve-casing and operatively connectedwith the engine-shaft, of apartition arranged within the aforesaid boreand extending circumferentially of t'he valve-bearing shaft, whichpartition is provided with a port which extends endwise therethrough andcommunicates with the aforesaid cylinderport; an exhaust-valve seatedandyieldably held against one end of 4the said partition, which valve isoperatively mounted on the valve-bearing shaft and has a port forconducting exhaust-steam fromthe -port in the partition, andafiuid-pressure-admission valve operativelymounted on the, valve-bearing shaft at the opposite end of the aforesaid partition andprovided with a port for conduct-vk ing live steam into the port in thepartition, substantially as shown and described. v

19. The combination,- with the engine-cylinder; the valve-casing, and acylinder-port opening into the interior chamber of the cylinder, of apartition arranged within and transversely of the valve-casing andprovided with a port which extends through the -partition andcommunicates with the aforesaid cylinderport; a rotary exhaust-valvearranged at and yieldablyheld against one end of the partition andprovided with an exhaust-port; a rotaryl iiuid-pressure-admission valvearranged at the opposite end of the partition and provided with afluid-pressure-conductingpo-rt; means for feeding iiuid under pressureto the port in the pressure-admission valve,-and means for operating thevalves, all arranged substantially as shown, for the purpose specified.

20. The combination, with'the engine-cylinder; the valve-casing having afluid-pressurereceiving chamber and an exhaust-chamber, and acylinder-port opening intol the interior chamber of the cylinder,of` apartition arranged within and transversely of the valvecasing betweenthe fluid-pressure-receiving chamber and exhaust-chamber and providedwith a port which extends through the partition and communicates-withthe cylinderport;

a rotary exhaust-valve seated and lyieldably held against one end of thepartition and provided with an exhaust-port; a rotaryfluidpressure-admission valve seated against the opposite end of Vthepartition and provided with a port which communicates with thefluid-pressu1re-receiving chamber; means for operating the valves, andmeans whereby some Huid under pressure is conducted from the said.iiuid-pressure-receiving chamber successively through thepressure-admission valve, partition and exhaust-valve and applied tohold the exhaust-valve against the partition.

21. The combination, with the engine-cylinder; the engine shaft; thevalve-casing having a fluid-pressure-receiving chamber and anexhaust-chamber; the ytwo cylinder-ports opening into opposite endsrespectively of the interior chamber of the cylinder, and thevalve-bearing shaft extending into the valvecasing and operativelyconnected with the engine-shaft, of two partitions fitting snugly withinthe valve-casing and provided each with spective partition and alsoconcentrically of the valve-bearing shaft, and the ports in thedifferent partitions communicating with the different cylinder-portsrespectively; valves operatively mounted on the valvebearing shaft andarranged to control the exhaust from and admission of live steam to theport in the partition; adjustable plates for controlling the size andarrangement of the'ends of curing the said plates in thc desiredadjustment. Y

E22. The combination, with the engine-cylinder; thevalve-casing having aiiuid-pressurereceiving chamber and an exhaust-chamber and the twocylinder-ports opening into opposite ends respectively ofthe interiorchamber of the' cylinder, of twov partitions fitting snugly within thevalve-.casing and provided each-with a port which extends endwise through the respective partitions,and the ports` in the differentpartitions communicating with `the different cylinder-portsrespectively; a rotary exhaust-valve having bearing against one endofeach partition and provided with a portwhich communicates withtheaforesaid exhaust chamber and extends through the valve; a rotaryiuid-pressure-admission valve seated against the opposite end of thesaid partition and provided with a port which communicates with theaforesaid Huid-pressurereceiving chamber and extends through the valve;and eachpartition provided, in each end thereof, with twovalve-seat-forming adjustable plates; means for securingthe said platesin the desired adjustment, and means for operating the valves.

23.' The combination, with the engine-cylinder;,th`e valve-casinghaving-a fluid-pressurereceiving chamberand' an exhaust chamber,

vopposite ends respectively ofthe interior a port which extends endwisethrough the rethe ports in the partitions, and means for se- TOO and thetwo.- cylinder-ports opening into V chamber of the cylinder, of twopartitions fitting snugly within the valve-casing and provided each witha port which extends endwise through the respective partition, and theports in the different partitions communicating with the differentcylinderports respectively; a rotary exhaust-valve arranged at one endof each partition and provided with a port for conducting exhaust-steamfrom the port in the said partition; a rotary fluid-pressure-admissionvalve arranged at the opposite end of the said partition and providedwith a port for conducting live steam to the port in the said partition;adjustable plates for controlling the size and arrangement of the outerends of the ports in the partitions; means for securing the said plateslin` the desired adjustment, and means for operating the valves.

24. rlhe combination, with the engine-cylinder; the valve-casing havinga fluid-pressurereeeiving chamber and an exhaust-chamber and the twocylinder ports opening into opposite ends respectively of the interiorchamber of the cylinder, of two partitions fitting snugly within thevalve-casing and provided each with a port which extends endwise throughthe respective partition, and the ports in the different partitionscommunicating with the different cylinder-ports respectively; a rotaryexhaust-valve arranged at one end of each partition and provided with aport for conducting exhaust-steam from the port in the said partition; arotary iiuid-pressure-admission valve arranged at the opposite end ofthe said partition and provided with a port for conducting live steam tothe port in the said partition; means for operating the valves;adjustable plates for controlling the size and arrangement of the innerends of the ports in the partitions, and means for securing the saidplates in the desired adjustment.

25. The combination, with the engine-cylinder; the engine-shaft; thelvalve-casing having a fluid-pressure-receiving chamber and anexhaust-chamber; a cylinder-port opening into the interior chamber ofthe cylinder, and,

a valve-bearing shaft extending into thevalvecasing and operativelyconnected with the engine-shaft, of a partition snugly fitting withinthe valve-casing and surrounding the valvebearing shaft, which partitionis provided with a port which extends endwise through the partition andalso concentrically of the valvebearing shaft and communicates with theaforesaid cylinder-port; an exhaust-valve seated against one end of thesaid partition and operatively mounted on the valve -bearing shaft,which valve is provided with a port which extends through the valve andalso concentrically of the valve-bearing shaft and communicates with theaforesaid exhaust-chamber; a fiuid-pressure-admission valve operativelymounted on the valve-bearing shaft at the opposite end of the partitionand provided with a port which extends through the said valve andcommunicates with the aforesaid fluid -pressurc-receiving chamber, andthe aforesaid partition comprising an annular block surrounding thevalve-bearing shaft and provided, in each end thereof, with a circularrecess extending circumferentially of the valve-bearing shaft; twovalve-seat-forming plates arranged within each of the said recesses andextending concentrically of the shaft, and means for securing the saidplates in the desired adjustment.

26. rlhe combination, with the engine-cylinder; the valve-casing havinga fluid-pressurereceiving chamber and an exhaust-chamber, and acylinder-port opening into the interior chamber of the cylinder, of apartition snugly fitting within and arranged transversely of thevalve-casing, which partition is provided with a port which extendsthrough the partition and communicates with the aforesaid eylinder-port;an exhaust-valve seated against the said partition at one end of theport in the partition and provided with a port which extends through thevalve and communicates with the aforesaid exhaust-chamber; afluid-pressure-admission valve at the opposite end of the port in thepartition and provided with a port which extends through the said valveand communicates with the aforesaid uid-pressure-receiving chamber, andthe partition comprising a block provided with a circular recess, platesarranged within and extending endwise of the said recess; means forsecuring the said plates in the desired adjustment, and means foroperating the valves.

27. The combination, with theengine-cylinder; the valve-casing having aHuid-pressurereceiving chamber and an exhaust-chamber, and acylinder-port opening into the interior chamber of the cylinder, of apartition snugly litting within the valve-casing, which partition isprovided with a port which extends through the partition andcommunicates with the aforesaid cylinder-port; au exhaust-valve seatedagainst the said partition at one end of the port in the partition andprovided with a port which extends through the valve and communicateswith the afore- .said exhaust-outlet; a fluid-pressure-admission valvearranged at the opposite end of the port in the partition and providedwith a port which extends through the valve and communicates with theaforesaid iluid-pressurc-receiving chamber, and the partition beingprovided, with adjustable plates controlling the size and arrangement ofone end of the port in the partition; means for securing the said platesin the desired adjustment, and means for operating the valves.

28. The combination, of the engine-cylinder; the valve-casing having a[luid-pressurereceiving chamber and an exhaust-chamber, the twocylinder-ports opening into the interior chamber of the cylinder, twopartitions within the valve-casing and provided each with a port whichextends through the respective partition, and the ports in thediferentpartitions communicating with the diiferent cylinder-ports respectively;an exhaust-valve n through the valve; a fluid-pressure-admission valvearranged at the opposite end of the partition and provided with a lportwhich communicates'with the aforesaid Huid-pressurereceiving chamber andextends through the said valve; means for operating the valves, andmeans whereby the commencement and the termination of the period offluid-pressure admission to either cylinder-port can be changed orregulated independently of each other.v v

29. The combination, of the engine-cylinder; the valve-casing having afluid-pressurereceiving-chamber and an exhaust-chamber; the twocylinder-ports opening into the interior chamber of the cylinder; twopartitions within the valve-casing and provided each with a port whichextends through the respective partitionand the ports in the differentpartitions communicating with the different cylinder-ports respectively;an exhaust-valve having bearing against the said partition vat one endof the port in the partition and provided with a port which communicateswith the aforesaid exhaust-chamber and extends through the valve; aHuid-pressure-admission valve arranged at the opposite end of thepartition and provided with a port which communicates with the aforesaidfluidpressure receiving chamber and extends through the s'aid valve;means for voperating the valves, and means whereby the beginning,duration and termination of the period of fluid-pressure admission toyeither cylinderport can be changed or regulated Aindependently of thecommencement, duration and terminationof the period of iuid-p'ressureadmission to the other cylinder-port.l

30. The vcombination, of the engine-cylinder; the valve-casing having aHuid-pressurereceiving chamber andan 'exhaust-chamber; the twocylinder-ports opening' into the interior chamber ofthe cylinder; twopartitions within the valve-casing and provided each with a port whichextends through the respective partition and the ports inthe differentpartitions communicating with the dierent cylinder-ports respectively;an exhaust-valve having bearing against the said partition at one end ofthe port in the partition and-provided with a port which communicateswith thc aforesaid exhaust-chamber and extends through the valve; afluid-pressure-admission valve arranged at the opposite end of thepartition and provided with ya port which communicates with theaforesaid fluid-pressurereceivingA chamberr and: extends through? thesaid valves; means for operating the valves,

kand means whereby the beginning, duration and termination of the periodof fluid-pressure admission to either cylinder-port can be changed orregulated independently of the termination, duration and commencement ofthe period of release or exhaust through the other cylinder-port.

31. The combination, of the engine-cylinder; the valve-casing havingafluid-pressurereceiving chamber and an exhaust-chamber; the twocylinderports opening into the interior chamber of the cylinder;'twopartitions vwithin-the valve-casingand provided each with a port whichextends through the respective partition and the ports in the differentpartitions communicating with the different cylinder ports respectively;an exhaust valve having bearing against the said partition at one end ofthe port in the partition and provided with a port whichcommunicateswith the aforesaid exhaust chamber and extends through the Valve; afluid-pressure-admission valve arranged at the opposite end of thepartition and provided with a port which communicates with the aforesaidfluid-pressurereceiving chamber and extends through the said valve;meansfor operating thevalves,

and means whereby the commencement Aand the termination of the period ofexhaust or release through either cylinder-port can be changed orregulated independently of each other'.

32. rlhe combination, of the engine-cylinder; the valve-casing havingafluid-pressurereceiving chamber and an exhaust-chamber; the twocylinder-ports opening into the interior chamber of the cylinder; twopartitions within the valve-casing-and provided each with a port whichextends through the respective partition and the ports in the differentpartitions communicating with the different cylinderports respectively;an exhaustvalve having bearing against the said partition at one end ofthe port in the partition and provided lwith a port which communicateswith the'aforesaid exhaust-chamber and extends through the valve; afluid-pressure-admission valve arranged at the opposite end of thepartition and provided with a port which communicates with the'aforesaidfluid-pressurereceiving chamber and extends through the said valve;means for operating the valve, and means whereby the beginning, durationand termination .of the 'period of exhaust or release through eithercylinder -port can be changed or regulated independently of thecommencement, duration and termination of the period of exhaust orrelease inexhausting through the other cylinder-port.

33. rlhe combination, of the engine-cylinder; the valve-casinghavingafiuid-pressurereceivingchamber and an exhaust-chamber; the twocylinder-ports openinginto theinterior chamber of the.- cylinder; twopartitions'iit- IOO lIO

ting snugly within the valve-casing and pronicates with the aforesaidexhaust-chamber and extends through the valve; afluid-pressure-admission valve arranged at the opposite end of thepartition and provided with a port which communicates with the aforesaidliuid-pressure-receiving chamber and extends through the said valve;means for operating the valves, and means whereby the beginning,duration and termination of the period of exhaust or release througheither cylinder-port can be changed or regulated independently of thetermination, duration and commencement of the period of Huid-pressureadmission to the other cylinder-port.

34. The combination, with the engine-cylinder; the engine-shaft; thevalve-casing provided interiorly with a bore extending longitudinally ofthe valve-casing; two cylinderports opening into opposite endsrespectively of the interior chamber of the cylinder and connecting withthe aforesaid bore a suitable distance apart longitudinally of thevalve-casing; a valve-bearing shaft extending into and longitudinally ofthe valve-casing fromentside of the said casing and operativelyconnected with the engine-shaft; two partitions arranged within andtransversely of the aforesaid bore and provided each with a port whichextends through the respective partition, and the ports in the differentpartitions communicating with the different cylinder-ports respectively;two exhaust-valves provided each with an exhaust-port and seated againstthe different partitions respectively at the exhausting end of the portin the respective partition and operatively mounted on the aforesaidvalVe-bearing shaft; two fluid-pressureadmission valves operativelymounted on the said valve-bearing shaft at the Huid-pressuretaking endof the port in the different partitions respectively and provided eachwith a uid-pressure-conducting port, and means for supplying liuid underpressure to the ports in the pressure admission valves, of anothervalve-bearing shaft arranged within and extending longitudinally of thefirst-mentioned valve-bearing shaft; governing mechanism establishingoperative connection between the inner valve-bearing shaft and the outervalvebearing shaft, and two cut-0E valves arranged within thevalve-casing and operatively connected with the inner valve-bearingshaft and arranged to regulate the supply of iuid under pressure to theports in the dierent partitions respectively.

35. The combination, with the engine-cylinder; the engine-shaft; thevalve-casing provided interiorly with a bore extending longitudinally ofthe valve-casing; two cylinderports opening into opposite endsrespectively of the interior chamber of the cylinder and connecting withthe aforesaid bore a suitable distance apart longitudinally of thevalve-casing; a valve-bearing shaft extending into and longitudinally ofthe valve-casing' from outside of the said casing and operativelyconnected with the engine-shaft; two partitions arranged within andtransversely of the aforesaid bore and provided each with a port whichextends through thc respective partition, and the ports in the differentpartitions conu'nuuieating with the different cylinder-portsrespectively; two exhaust-valvcs provided each with an exhaust-port andseated against the dill'erent partitions respectively at the exhaustingend of the port in the respective partition and operatively mounted onthe aforesaid valvebearing shaft; two iiuid -prcssure-admission valvesoperatively mounted on the said valvebcaring shaft at theiiuid-pressure-taking end of the port in the different partitionsrespectively and provided each with a fluid-pressureconducting port, andmeans for supplying luid under pressure to the ports in thepressureadmission valves, of another valve-bearing shaft arranged withinand extending longitudinally of the first-mentioned valve-bearing shaft;governing mechanism establishing operative connection' between thc innervalvebearing shaft and the outer valvchearing shaft; two cut-off valvesarranged within the valve-casing and mounted on the outer valvebearingshaft and arranged to regulate the supply of iiuid under pressure to theports in the different partitions respectively; keys establishingoperative connection between the cut-off valves and the innervalve-bearing shaft and extending from within the inner valvebearingshaft through the outer wilvc-bearing shaft into the said valves, andthe outer valvebearing shaft being slotted circumferentially toaccommodate the location of the keys.

36. The combination, with the engi nc-cylinder; the engine-shaft; thevalve-casing provided interiorly with a bore extending longitudinally ofthe valve-casing; two cylinderports opening into opposite endsrespectively of the interior chamber of the cylinder and connecting withthe aforesaid bore a suitable distance apart longitudinally of thevalve-cas ing; a valve-bearing shaft extending` into and longitudinallyof the valve-casing from outside ofthe said casing; two partitionsarranged within and transversely of the aforesaid bore and provided eachwith a port which extends through the respective partition, and theports in the different partitions communicating with the differentcylinder-ports respectively; two exhaust-valves provided each with anexhaustport and seated against the different partitions respectively atthe exhausting end of the port in the respective partition andoperatively IOC lof

